<html>
<head>
	<meta charset="UTF-8">
	<meta content="IE=edge" http-equiv="X-UA-Compatible">
	<meta content="initial-scale=1.0, maximum-scale=1.0, user-scalable=no, width=device-width" name="viewport">
	<title>4791：[CERC2016]Free Figurines</title>
	<!-- css -->
	<link href="../css/base.min.css" rel="stylesheet">
	<link href="../css/project.min.css" rel="stylesheet">
	
	<!-- favicon -->
	<!-- ... -->
</head>
<body class="page-brand">
	<header class="header header-transparent header-waterfall ui-header">
		<ul class="nav nav-list pull-left">
			<li>
				<a data-toggle="menu" href="#menu">
					<span class="icon icon-lg">menu</span>
				</a>
			</li>
		</ul>
		<a class="header-logo header-affix-hide margin-left-no margin-right-no" data-offset-top="213" data-spy="affix">[CERC2016]Free Figurines</a>
		<span class="header-logo header-affix margin-left-no margin-right-no" data-offset-top="213" data-spy="affix">[CERC2016]Free Figurines</span>
	</header>
	<nav aria-hidden="true" class="menu" id="menu" tabindex="-1">
		<div class="menu-scroll">
			<div class="menu-content">
				<a class="menu-logo" href="../index.html">BZOJ离线题库</a>
				<ul class="nav">
					<li>
						<a class="waves-attach" data-toggle="collapse" href="#problems">题目</a>
						<ul class="menu-collapse collapse in" id="problems">
							<li>
								<a class="waves-attach" href="../index.html">主页</a>
							</li>
							<li>
								<a class="waves-attach" href="../list.html">题目列表</a>
							</li>
						</ul>
					</li>
					<li>
						<a class="collapsed waves-attach" data-toggle="collapse" href="#about">关于</a>
						<ul class="menu-collapse collapse" id="about">
							<li>
								<a class="waves-attach" href="../about.html">关于此项目</a>
							</li>
						</ul>
					</li>
					
				</ul>
			</div>
		</div>
	</nav>
	<main class="content">
		<div class="content-header ui-content-header">
			<div class="container">
				<h1 class="content-heading">
                [CERC2016]Free Figurines                </h1>
                <p>时间限制：20s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  空间限制：512MB</p>			</div>
		</div>
		<div class="container">
			<section class="content-inner margin-top-no">
				<div class="row">
					<div class="col-lg-13 col-md-13">
						<div class="card margin-bottom-no">
							<div class="card-main">
								<div class="card-inner">
									
                                <h3>题目描述</h3><p><div>俄罗斯套娃是一些尺寸递增的木制雕像，它们可以嵌套在一起。每个套娃可以放进一个更大的套娃，也可以被放入</div>
<div>一个更小的套娃。每个套娃内部最多只能直接嵌套一个套娃，但是那个套娃内部还可以继续嵌套。给定n个尺寸互</div>
<div>不相同的套娃，按尺寸从小到大依次编号为1到n。如果套娃a被直接嵌入套娃b，那么我们称b是a的父亲，如果一个</div>
<div>套娃没有父亲，那么我们称它是自由的。一组镶嵌方案可以用每个套娃的父亲来表示。我们可以每步可以做以下两</div>
<div>种操作中的任意一种：</div>
<div></div>
<div>1.把一个自由的套娃直接嵌入一个更大的没有被放入东西的套娃。</div>
<div></div>
<div>2.选择一个不自由的套娃，将其从其父亲中取出。</div>
<div></div>
<div>给定初始局面，请计算达到目标局面的最小的操作步数。</div></p><hr/><h3>输入格式</h3><p><div>第一行包含一个正整数n(1&lt;=n&lt;=100000)，表示套娃的个数。</div>
<div>第二行包含n个整数p_1,p_2,...,p_n(0&lt;=p_i&lt;=n)，依次表示初始局面中每个套娃的父亲，0表示自由套娃。</div>
<div>第三行包含n个整数q_1,q_2,...,q_n(0&lt;=q_i&lt;=n)，依次表示目标局面中每个套娃的父亲，0表示自由套娃。</div>
<div>输入数据保证初始局面和目标局面均合法。</div></p><hr/><h3>输出格式</h3><p><div>输出一行一个整数，即最小操作步数。</div></p><hr/><h3>样例输入</h3><pre>7
3 5 4 0 7 0 0
3 5 0 6 7 0 0</pre><hr/><h3>样例输出</h3><pre>2</pre><hr/><h3>提示</h3><p>没有写明提示</p><hr/><h3>题目来源</h3><p>没有写明来源</p>
								</div>
							</div>
						</div>
					</div>
				</div>
				
				
			</section>
		</div>
	</main>

	<div class="fbtn-container">
		<div class="fbtn-inner">
			<a class="fbtn fbtn-lg fbtn-brand-accent waves-attach waves-circle waves-light waves-effect" data-toggle="dropdown" aria-expanded="true"><span class="fbtn-text fbtn-text-left">Menu</span><span class="fbtn-ori icon">apps</span><span class="fbtn-sub icon">close</span></a>
			<div class="fbtn-dropup">
				<a class="fbtn fbtn-brand waves-attach waves-circle waves-light waves-effect" href="../list.html" target="_self"><span class="fbtn-text fbtn-text-left">题目列表</span><span class="icon">menu</span></a>
				<a class="fbtn fbtn-green waves-attach waves-circle waves-effect" href="../index.html" target="_self"><span class="fbtn-text fbtn-text-left">返回主页</span><span class="icon">home</span></a>
				<a class="fbtn waves-attach waves-circle waves-effect" href="http://www.lydsy.com/JudgeOnline/submitpage.php?id=4791" target="_blank"><span class="fbtn-text fbtn-text-left">提交代码</span><span class="icon">send</span></a>
				<a class="fbtn fbtn-orange waves-attach waves-circle waves-effect" href="http://www.lydsy.com/JudgeOnline/wttl/wttl.php?pid=4791" target="_blank"><span class="fbtn-text fbtn-text-left">试题讨论</span><span class="icon">chat</span></a>
				
			</div>
		</div>
	</div>

	<!-- js -->
	<script src="../js/jquery.min.js"></script>
	<script src="../js/base.min.js"></script>
	<script src="../js/project.min.js"></script>
</body>
</html>